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  <title>Acquires a strong reference on that object</title>

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</div><hr /><div id="weakref.acquire" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">Weakref::acquire</h1>
  <p class="verinfo">(PECL weakref &gt;= 0.1.0)</p><p class="refpurpose"><span class="refname">Weakref::acquire</span> &mdash; <span class="dc-title">Acquires a strong reference on that object</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-weakref.acquire-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">bool</span> <span class="methodname"><strong>Weakref::acquire</strong></span>
    ( <span class="methodparam">void</span>
   )</div>

  <p class="para rdfs-comment">
   Acquires a strong reference on that object, virtually turning the weak
   reference into a strong one.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-weakref.acquire-parameters">
  <h3 class="title">参数</h3>
  <p class="para">此函数没有参数。</p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-weakref.acquire-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns <strong><code>TRUE</code></strong> if the reference was valid and could be turned into a strong
   reference, <strong><code>FALSE</code></strong> otherwise.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-weakref.acquire-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-523">
    <p><strong>Example #1 <span class="methodname"><strong>Weakref::acquire()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">class&nbsp;</span><span style="color: #0000BB">MyClass&nbsp;</span><span style="color: #007700">{<br />&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;function&nbsp;</span><span style="color: #0000BB">__destruct</span><span style="color: #007700">()&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"Destroying&nbsp;object!\n"</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br />}<br /><br /></span><span style="color: #0000BB">$o1&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">MyClass</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$r1&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">Weakref</span><span style="color: #007700">(</span><span style="color: #0000BB">$o1</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$r1</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">acquire</span><span style="color: #007700">();<br /><br />echo&nbsp;</span><span style="color: #DD0000">"Unsetting&nbsp;o1...\n"</span><span style="color: #007700">;<br />unset(</span><span style="color: #0000BB">$o1</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$o2&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$r1</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">get</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">$r1</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">release</span><span style="color: #007700">();<br /><br />echo&nbsp;</span><span style="color: #DD0000">"Unsetting&nbsp;o2...\n"</span><span style="color: #007700">;<br />unset(</span><span style="color: #0000BB">$o2</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
Unsetting o1...
Unsetting o2...
Destroying object!
</pre></div>
    </div>
   </div>
  </p>

  <p class="para">
   <div class="example" id="example-524">
    <p><strong>Example #2 Nested acquire/release example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">class&nbsp;</span><span style="color: #0000BB">MyClass&nbsp;</span><span style="color: #007700">{<br />&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;function&nbsp;</span><span style="color: #0000BB">__destruct</span><span style="color: #007700">()&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"Destroying&nbsp;object!\n"</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br />}<br /><br /></span><span style="color: #0000BB">$o1&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">MyClass</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$r1&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">Weakref</span><span style="color: #007700">(</span><span style="color: #0000BB">$o1</span><span style="color: #007700">);<br /><br />echo&nbsp;</span><span style="color: #DD0000">"Acquiring...\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$r1</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">acquire</span><span style="color: #007700">();<br /><br />echo&nbsp;</span><span style="color: #DD0000">"&nbsp;&nbsp;Unsetting...\n"</span><span style="color: #007700">;<br />unset(</span><span style="color: #0000BB">$o1</span><span style="color: #007700">);<br /><br />echo&nbsp;</span><span style="color: #DD0000">"&nbsp;&nbsp;Acquiring...\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$r1</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">acquire</span><span style="color: #007700">();<br /><br />echo&nbsp;</span><span style="color: #DD0000">"&nbsp;&nbsp;&nbsp;&nbsp;Acquiring...\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$r1</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">acquire</span><span style="color: #007700">();<br /><br />echo&nbsp;</span><span style="color: #DD0000">"&nbsp;&nbsp;&nbsp;&nbsp;Releasing...\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$r1</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">release</span><span style="color: #007700">();<br /><br />echo&nbsp;</span><span style="color: #DD0000">"&nbsp;&nbsp;Releasing...\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$r1</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">release</span><span style="color: #007700">();<br /><br />echo&nbsp;</span><span style="color: #DD0000">"Releasing...\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$r1</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">release</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
Acquiring...
  Unsetting...
  Acquiring...
    Acquiring...
    Releasing...
  Releasing...
Releasing...
Destroying object!
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-weakref.acquire-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="methodname"><a href="weakref.release.html" class="methodname" rel="rdfs-seeAlso">Weakref::release()</a> - Releases a previously acquired reference</span></li>
   </ul>
  </p>
 </div>


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